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Contents

Pinout
Key specifications
CAD (KiCad official)
Provenance

README

markdown

NDP23A5QB

NDP · DC-DC Converters · QFN-20-EP(5x5)

NDP23A5QB from NDP, in a QFN-20-EP(5x5). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	GND	power_in	Ground pin; the datasheet's pin table assigns pins 1, 2 and 3 together with exposed pad PAD1 to GND.
2	GND	power_in	Ground pin; the datasheet's pin table assigns pins 1, 2 and 3 together with exposed pad PAD1 to GND.
3	GND	power_in	Ground pin; the datasheet's pin table assigns pins 1, 2 and 3 together with exposed pad PAD1 to GND.
4	NC	unconnected	Listed as no connect in the pin table, although the layout note says pin 4 is connected to VIN or GND.
5	NC	unconnected	Listed as no connect in the pin table, although the layout note says pin 5 is connected to VIN or GND.
6	VIN	power_in	Power input with a 7.5 V to 30 V input voltage range; VIN to GND absolute maximum is -0.3 V to 33 V.
7	VIN	power_in	Power input with a 7.5 V to 30 V input voltage range; VIN to GND absolute maximum is -0.3 V to 33 V.
8	VIN	power_in	Power input with a 7.5 V to 30 V input voltage range; VIN to GND absolute maximum is -0.3 V to 33 V.
9	NC	unconnected	Not connected.
10	BST	passive	Boot strap pin for the high-side switch drive; BST to GND is rated -0.3 V to VIN+7 V.
11	NC	unconnected	Not connected.
12	SW	power_out	Switching node connected to the inductor; SW to GND is rated -0.3 V to VIN+0.3 V.
13	SW	power_out	Switching node connected to the inductor; SW to GND is rated -0.3 V to VIN+0.3 V.
14	SW	power_out	Switching node connected to the inductor; SW to GND is rated -0.3 V to VIN+0.3 V.
15	NC	unconnected	Not connected.
16	FB	input	Output voltage feedback input compared with the internal 1.0 V reference; FB to GND is rated -0.3 V to 6.5 V.
17	CSP	input	Positive pole of the current sense amplifier; CSP to GND is rated -0.3 V to 25 V.
18	CSN	input	Negative pole of the current sense amplifier; CSP-CSN sense voltage is 21 mV min, 25 mV typ, 29 mV max.
19	EN	input	Enable input with internal pull-up; enable-on threshold is 1 V and enable-off threshold is 0.3 V.
20	FS	input	Connect a resistor to GND to set switching frequency; FS to GND is rated -0.3 V to 6.5 V.
21	EP	passive	Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter	Value
Manufacturer	NDP
Package	QFN-20-EP(5x5)
Category	Power Management (PMIC)
Pins	21

CAD (KiCad official)

Symbol: NDP23A5QB
Footprint: Package_DFN_QFN:QFN-20-1EP_5x5mm_P0.65mm_EP3.35x3.35mm
3D model: QFN-20-EP(5x5) (KiCad packages3D, STEP)
3D model files: ndp23a5qb-etched.step / ndp23a5qb-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ndp23a5qb.step / ndp23a5qb.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: NDP datasheet (14 pp, sha256 4e99169d88d6f3f5, retrieved 2026-10-10, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF